Skip the auto shop - Our mechanics make house calls

Q: Car runs but knocks

asked by on

My car starts but has a knocking noise. And every once in a while it idles out.

Hello. It sounds like there may be something inside the engine that is worn out or broken. This will cause a knocking noise and could also cause the truck to shut off. A compression test checks the compression of each cylinder, and can help to identify the problem in your engine. I would recommend having a certified mechanic inspect your vehicle’s knocking noise in order to have this issue resolved.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Harsh shift - 2004 Toyota Camry

Hi there. This may be a sign of a faulty transmission control solenoid. Modern automatic transmissions use pressurized hydraulic fluid to change gears. Every time a gear change is required, the car's computer activates a transmission solenoid, which directs transmission...

Q: Hey rusty my 2008 TB has a high pitched whine when the engine is running it increases with RPMs is this a belt replacement or a sign

This could definitely be time for a belt replacement or potentially just some belt dressing depending on the last time the belt was changed. Sounds can be difficult to pinpoint at times, I would recommend having an expert, like one...

Q: 4 wheel drive icon is staying on

If the switch for your four wheel drive has broken and your vehicle is now stuck in four wheel drive, it is very likely that the broken switch is the cause of your issue. I would recommend having this switch...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...